Questions tagged [android]
Linux-based Operating System running a Dalvik Virtual Machine produced by Google, typically seen in portable devices such as cellphones, e-book readers, tablets, etc. Not to be confused with Androids in the robotics sense.
232 questions
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Double audio output
simulate this circuit – Schematic created using CircuitLab
Hello
i am trying to have the same audio play on two usb earphones, i have tryed multiple adapters but nothing work, the software force ...
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4
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Why USB-C plug doesn’t charge? [closed]
I have multiple USB-C 5V chargers of the same type that do not charge connected android devices. Devices detect charging if these are turned off, but when turned on, no charging icon of any visual ...
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How to force a SLOW charge over USB
It is often asked how to charge faster over USB, but I want to do the opposite, charge overnight as slowly as possible, to preserve battery life.
If at all possible I'd like to limit charge current to ...
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1
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USB serial connection between Raspberry-pi and Android-phone
I have a Raspberry-pi-3-model-B and an Android phone device.
The connections are as follows:
My raspberry pi is connected to my laptop through USB (this is not the important part).
Also, from the ...
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Android phone/tablet and computer does not recognize the 2d lidar connected by type-C [closed]
We are using a lslidar m10 which has a type C interface. It can be connected to the USB A port on a computer and work fine.
Now we look to use the lidar with an android tablet/phone which only has a ...
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115
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NFC module commands/ TagLostException
I am trying to send commands and image data to an NFC module connected to an e-paper display and keep getting TagLostException, probably meaning the command is wrong. I have asked this question on ...
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5
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436
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What type of embedded sytem is used in a mobile phone(cell phone)?
What type of embedded system is used in a mobile?Is it a microcontroller, FPGA or a DSP
According to my understanding the basic and simple mobile phones like nokia 3310 used microcontroller since ...
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How can I buy or build a USB cable that will provide minimum charge current but maintain data conenctivity?
Question: How can I build or buy a USB cable (or hub or adapter or anything) that will limit the charging current to the minimum (0.1A I believe) without obstructing the data lines which would break <...
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What to set on Android/Windows laptop if I want to make them as slave?
I would like to control my Android smartphone/tablet or my Windows laptop using another Android/laptop or Arduino with HC-05 module. I want to control, such as, their volume, camera, microphone, and ...
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Is it possible that writing too quickly to an sd card can result in quicker failure?
I found this post suggesting that writing too quickly to an sd card will shorten its lifespan. The context is an sd card that will be used as external storage on android, written to with rsync. The ...
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Wiring an Android headset with push-to-talk functionality with active electronics to a standard TRRS connector
I'm using an app on an Android phone that creates the possibility to use the phone as radio with PTT. I'm now trying to build headset with PTT that could interface with the phone's 3.5 mm connector. I ...
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406
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Analog Android headphone command circuit not working together with microphone
I'm trying to make a headset with microphone (and stereo audio) for an Android phone. The headset will be connected to a 3.5 mm TRRS jack. I have read the specifications for such devices from Android ...
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How to access modem inside Android mobile from a PC through USB cable? [closed]
Every mobile has a modem inside it, which allows dialing phone numbers and connecting to data/GPRS.
I guess we can send AT commands to all modems in phones.
So if I tear down an Android phone e.g. a ...
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How to send AHD video wirelessly to an Android device (short range ~3m)?
I have an underwater camera (wired to the water surface) which streams AHD digital video to a RG59 connector.
I would like be able to stream the video to an Android device.
It doesn't have to be a ...
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Can't send more than 160 bytes to module using Bluetooth on Android
I am unable to send more than 160 bytes to a Bluetooth (BLE) module from my Android application. I am sending data from my modified FastBle Android app to a microchip RN4871 Bluetooth module. I'm ...
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Multiple simultaneous ESP32 BLE connections to one mobile device
I'm trying to find out if it's possible for at least two ESP32's to maintain active BLE connections with one Android mobile device at the same time.
What I'm basically trying to do is to send analog ...
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Replace phone battery with power supply circuit BL-T5
I have an old nexus phone LG e960 I'd like to use for a project permanently connected to mains .
The battery is long dead and it no longer charges. I've swapped it but the replacement didn't last long....
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80
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Embedded Android for custom device
I am using a SOC (System on a Chip) attached to some peripherals like camera and screen. Since this is not a very common hardware setup like a Raspberry Pi where there are adapted android builds for, ...
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166
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Temperature monitoring over Bluetooth
I bought this temperature + pressure + other things sensor that operates over bluetooth.
Here it is : https://ae01.alicdn.com/kf/HTB1HebxRSzqK1RjSZFjq6zlCFXaH/Module-de-capteur-d-acc-l-ration-de-...
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Replacing phone battery with power supply
I have an old phone (nexus 5) that I want to use for a project. I need to replace the battery with a permanent power supply, I've found the 3 pins of the battery and made a breakout connection with 1/...
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112
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Android game reccomendation for electronics
I would like someone to reccomend me a android game regarding electronics (medium or advanced level game, no low level).
Backstory of the reason im not looking it up on my own:
I am in the hospital ...
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How to connect one Android mobile audio output to the microphone of another Android mobile?
This question is to help the "hard of hearing community" so that they can READ the phone/mobile call because they can not hear it.
Android has some really good (and free, too) apps which can ...
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Bluetooth receiver board into 60's console stereo Tape In
I'm looking for a bluetooth receiver board to connect to the Tape In of my 60s stereo record player console. We've used our Android phones with a 1/8" to RCA Y cable into the Tape In, and it ...
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USB vs Bluetooth power saving
I need to transfer almost all kinds of data (arrays, video/audio stream, control signals) between mcu and an Android smartphone. MCU will accumulate data from smartphone and further send it by other ...
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Smartphone Gyroscope Range (radians / second)
I'm using gyroscope recordings of Android Smartphones. The measurements are in radians / second. I recognized that sometimes there are some outliers and also the range is different between smartphones....
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Interpretation of Rotation Vector Measurements
I use android devices (Xiaomi Mi9-SE (Android 10) & Huawei P10 (Android 9)) to collect movement data from bicycle rides. Hereby, I am measuring i.a the Rotation Vector which describes the rotation ...
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213
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android phone USB cc pin control
I'm trying to find out if there is any way to control the CC lines on a USB-C from an android app. I need to signal to my embedded gadget some event, instigated from an android app. I can't find any ...
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USB host stack for PIC32
I have a board built around a PIC32MZ that uses a FTDI 312D to communicate through tbe UART with an Android device.
What kind of software do I need on the PIC32 side so I can get rid of the FTDI and ...
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Generic tablets and single board computers
I've been pondering the idea for a while now in regards to a project I've had in mind. Essentially, I was wondering how I would go about obtaining generic tablet/phone motherboard designs? Would I be ...
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Bluetooth Compatibility
In the prototype I'm working, I'm using my phone to communicate with the Bluetooth module RN4871 (https://www.microchip.com/wwwproducts/en/RN4871). Now I'm planning to buy a chinese Android industrial ...
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Send data using USB-PD on android phones [ROOT]
USB-PD can transfer data at low speeds between devices and is quite a bit simpler than normal USB communication.
Is it possible for an android app to send arbitrary USB-PD data? The phone has root ...
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3
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Headphone jack IR transmitter not working reliably
I'm working on a project to build a remote control app for some IR controlled toys like DeskPets, Robosapien, TOMY etc. including an IR transmitter that (hopefully) has a very high range.
I built an ...
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Connecting PIC32 through FT312D to Android tablet
I need to connect my PIC32 to an Allview Android tablet over USB so that the tablet will charge from my PIC board and also be able to communicate at the same time.
I can connect the PIC32 to a FT312D ...
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Connecting a PIC32MZ with an Android tablet via USB
I have an Allview tablet running Android I want to connect to my board using USB. An application on the Android tablet would control the micro which in turn would control a bunch of relays and read ...
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Poor man's oscilloscope - more simple
In our lab we have NI cards and work with -10 to 10V. Oscilloscopes are rare and some mobile and quick-and-dirty solution would be fine for debugging. Therefore the 'poor man's oscilloscopes' that ...
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Android Tablet Side Connector Interface Information [closed]
I'm not sure if this is on topic or not, but I'm trying to find out about the interface found on the side of some Android devices. An example can be found by side of the "pipo n2" device. It ...
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can someone help me build a usb jig to force android device into recovery
Years ago i bricked a phone trying to install a ROM not designed for that phone. As a result the phone went into a bootloop and would not go into recovery mode. Researching the problem i found a ...
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2
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Connecting CDC device to Android over USB-C, with concurrent charging. A cheap option?
I'm working on a PCB to both charge an Android tablet and also allow Android to connect to the PCB via Serial port (PCB includes an ATMega8u2 configured as a CDC, supplying a Serial port). To enable ...
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0
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Easiest way to send basic data from Android to ESP8266 through WiFi
I'm not really familiar with network protocols, but my application is very simple:
The ESP8266 is connected to the phone's WiFi hotspot (so they're both on the same network).
The phone sends 1 (as in ...
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Are there any sensors out there that detect how tightly a particular object is held by a human hand?
I'm trying to find a solution for quantitatively measuring the amount of tightness with which a smartphone is held by a human hand.
Is there any way of using the current sensors in an Android phone to ...
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113
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Micro USB b connection detector
Is there a way to detect if there is a Micro USB B cable physically inserted into a micro USB B receptacle, even if it is just a cable (with nothing attached to it). in android device
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How to find a compatible upgrade for a phone camera [closed]
I have a set of Android video glasses which are based on the PRIXTON C18 phone. I'd like to upgrade the camera to a better one - specifically one that supports changing the shutter speed as the ...
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1
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658
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STM32 BLE profiles - multiple sensors active ST BLE Sensor App
I have done the MOOC for the stm32wb55 BLE profiles and now I am trying to introduce more BLE characteristics.
I managed to make the sensors work and to transmit them to the ST BLE Sensor app. However ...
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2
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What is the appropriate unit for measuring power consumption by a section of code?
I am wanting to measure the energy consumption of running some intensive blocks of code on Android, but I am very shakey with my electricity knowledge, so I am unsure what measurements I should be ...
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How to charge an android device with a buck converter
I've got a male micro USB connector like this one
I'm feeding the output of a buck converter set at 5V to pin 1 positive and pin 5 negative. Remaining pins are not connected. When I plug the ...
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108
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How to Prevent Current Drain from an Android Phone's USB Connector? [closed]
Noob alert - I'm very much a hobbyist not a professional so doubtless fall into the 'little knowledge is a dangerous thing' category.
So... I have a project which requires simultaneous charging of ...
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1
answer
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How to connect a line-out to mic on Android plug? (CTIA)
I want to connect line-out of a device to the microphone input of an Android phone, a Xiaomi Mi 4X. Then I can record and live stream from the phone.
If I simply connect line-out left/right (red/...
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1
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Measuring the instantaneous power consumption of phone
We can get the instantaneous current consumption and battery voltage via Android's API. So if we multiply those things, can we get the instantaneous power consumption of device? (P=V.I)
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Implement a data protocol between a smartphone and a MCU via NFC hardware?
If I'm able to develop a mobile app which is able to use the NFC hardware of a smartphone to write/read through it. And if I have a board containing a MCU and a NFC transponder like the IC from ST ...
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295
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feasibility of transmitting uncompressed 16-bit PCM audio through bluetooth
I wonder about the feasibility of this idea, and whether this is something worth doing more research on.
I am trying to send 16-bit 16 kHz single channel microphone audio via bluetooth, from one ...
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